Zoohgy.} NATURAL HISTORY OF VICTORLl. ^Mammals. 



Plate 22. 



DELPHINUS NOV^ ZEALANDI^ (Quoy and Gaim.). 



The Yellow-sided Dolphin, 



[Genus DELPHINUS (Lm. as restricted by Gbat). (Sub-kingd. Vertebrata. Class Mam- 

 malia. Order Cetacea. Fam. Delphiuidie.) 



Head and forehead rounded, witli a suddenly narrowed beak in front, separated by a trans- 

 verse groove from the head. Dorsal fin falcate, in middle of back. Pectoral fin elongate, 

 falcate. Skull with hind wings of maxilla horizontal ; nose much longer than the head, taper- 

 ing, depressed in front, wider than higli, nearly parallel-sided, convex above, slightly concave in 

 front of blow-hole. Teeth subequal, pointed, tucm'ved, Jg'io ^o ttti> extending along greater 

 part of the length of each jaw.] 



Description. — Teeth: XTTi- Body rounded in front, taperino- behind, 

 becoming- much compressed and carinated above from about half-wav between the end 

 of the dorsal and the caudal fins ; snout, narrow cylindrical, depressed above, pointed 

 in front. Color: up])er part of bodj' g-lossy rich bhick as tar as half-wav between 

 dorsal fin and tail, beyond which the posterior part of the body is dark slate-coloi'; 

 edo-e of upper jaw, lower jaw, and belly dull-whitish ; pectorals blackish above, 

 whitish below ; dorsal dull-whitish or leaden-g'rej^ in middle, the maigins darker; 

 eye moderate, dark-brown, surrounded with a black margin extending- as a narrow- 

 streak forwards to join the black of the head, at front of triangular groove ; the 

 upper and lower edjres of this black mark being- margined with white. A laro-e, 

 wide, dull yellow-ochre colored patch extends on each side from the eye backwards 

 nearly as far as the hind edges of dorsal, widening- on middle of side and then 

 tapering- to posterior end. Skull. — Palate deeply concave along- each side behind, 

 middle very prominent. 



JlEASnREMENTS OF MODEKATE-SIZED SPECIMEN. 



Length from tip of lower jaw to centre of tail 



„ from tip of snout to anterior edge of blower 



„ from tip of snout to anterior point of triangular furrow in 



front of forehead 

 „ from tip of snout to eye 

 Girth behiud pectorals... 



Length from tip of snout to front of pectoral 

 „ from tip of snout to front of dorsal 

 „ of pectoral 

 Greatest width of pectoral 

 Height of dorsal along front edge 

 Length along base of dorsal 

 Width of tail 



Length of .^kull from condyles to tip of snout 

 Lower jaw projecting 4 lines beyond upper jaw — 

 Length of lower jaw 



„ of dental series of lower jaw 



„ from tip of snout to anterior edge of blowers on skull... 



Reference. — Quoy and Gaimard, Voyage de I'Astrolabe.— PI. 28, f. 1. 

 Deem. [ 9 ] J 



